Cooling apparatus for turbo-compressors.



W. GRN.

COOLING APPARATUS FOB. TURBO GOMPRESSORS.

APPLIGATION FILED JUNE z2, 1910.

985,161. Patented Feb.`28,1911.

lll/1114111 through chambers provided in thewal'ls of' "UNITED STATESPATENT onirica.

WILLIBALD GRUN, or FRANxFoRT-oN-THE-MAIN, GERMANY.

To all whom it may concern:

Be it known that- I, WILLIBALD chief engineer, a citizen of the GermanEmpire, and a resident of Testendstrasse 81, F rankfortoii-the-Main, inthe Kingdom of Irussia, Germany, have invented certain new and usefulImprovements in Cooling Apparatus for Turbo-Compressors; and I do herebydeclare the following to be a full,

clear, and exact description of the invention, such as will enableothers skilled in the art to which itappertains to make and use thesame.

My invention relates to improvements in cooling apparatus forturbo-compressorsor rotary blade compressors. And the object of theimprovements is to provide cooling apparatus .whereby the cooling-medium and the cooling surfaces arel utilized as completely aspossible. In turbocompressors now in use Vthe fluid has `been cooled inthe successive stages of the compressor by circulating af coolingmediumthe compressors. In turbo-compressors it is of the utmost importance tokeep the teniperature ofthe iiuid subjected to the compressing operationas low as possible.` lHowever, the space for'providing cooling means inthe compressor is exceedingly small. Therefore in order to sufficientlycool the iuid, the coolingmeans provided between' the successive stagesof the compressor must be as effective as possible. In cooling apparatusnow in .use the `cooling mediuin flows in a direction parallel to thecooling surface. Now I have discovered, that the cooling effeet can beconsiderably increased by causing the cooling medium to strike againstthe cooling surfaces as often as possible 'in a perpendicular orsubstantially perpendicular direction, because thereby the transmissionof the temperature of the cooling medium to the cooling surfaces isincreased. Therefore my invention consists in so arranging the cooling devices for the turbocompressor, that within thecomparatively small spacethe cooling medium strikes sev# eral times against the cooling surfacesin a substantially perpendicular direction'.

For the purpose of explaining the invention an example embodying thesame has been shown in the accompanying drawing in which the sameletters of references have GRUN,

COOLINGAPPRETUS FOR TURBO-COMPRESSOR.

Specication of Letters Patent. Patented Feb. 28,191.1. Application filedJune 22, 1910. Serial No. 568,249. i

sponding parts.

In said drawings-Figure 1, is a horizontal cross-section of the coolingapparatus ltaken on the line 1-1 of Fig. 2, Fig. 2, is a sectionof theapparatus taken on the broken line 2-2of Fig. l, and Fig. 3, is ahorizontal cross-section similar to that -of Fig. l and showing amodification of the apparatus.

In the example shown the lcooling apparatus consists of two flat!annular hollow bodies a and b which communicate with each other throughintermediate chambers c arranged perpendicularly thereto. The coolingmedium is admitted for example to the chamber provided by the booy 7Jthrough an aperture d formed in the cylindrical wall been used-in allthe views to indicate correof the said body, and it is conducted in the`direction of the arrow through the intermediate chamber c until itstrikesperpendicularly against the coolingl wall of the inner hollowbody a. In a similar way the cooling 'medium passes through the firstintermediate chambers successively from the chamber a to the chamber band from the chamber b to the chamber a. In the example illustrated theeffect of the cooling medium is further increased by dividing theintermediate chambers c by partitions f into two sections or passages c1and'cz, and the 4cooling medium flows as follows: The cooling mediuml isadmittedl for instance through the aperture d of the cylindrical wall ofthe outer hollow body b and into the chamber e1 of the latter, flowsthrough the inner part c1 of the .intermediate lchamber c and into thechamber g1 `of the inner hollow body a, and is admitted through the partc2 of the intermediate chamber cinto the chamber c2 of the body I).,From thence the cooling medium iows through the inner partci of thenext intermediate chamber c and i'ntothe chamber g2 of the body a,and'it passes through the part c2 of the adjacent .intermediate chamberc and intojthe chamber c3 of the body Z2, and so on, until it isdischarged through'the opening h' of the hollow body Z). Thev coolingmediuml is therefore always conducted through the sec-` l tions of .theintermediate chambers c in .0pposite directions, so that it is twicethrown against' the cooling surfaces in a perpendicular direction. Thesuccessive sections -ably' subdivided' by radial partitions z' in l1fcleaning lapertures are exclusively such a way, that the coolingmediumvlows through the chambers thus'provided along a serpentinelpath.- particularly advantageous, because only a limitednuinber ofintermediate chambers c can be arranged between the hollow bodies a andbecause otherwise the .cross-sectional area of the passages for the airwould be too small.

Byl the arrangement described, with the largest possible number ofintermediate chambers c'tlie' direction of the flow of thecooling'medium can twiceas often be re-A versed as compared with hollowintermediate'. chambers which are not provided with partitions. Thechambers cvinay be further subdivided byv providing two or morepartitions f in each chamber o. Finally in order to increase the coolingefect ribs may be provided between t-lie chambers c.

As the hollow bodies a. and I) are rigidly connected with each other bythe intermediate chambers c the chambers traversed by 'the coolingmedium can not easily be cleaned,

rovided in the -cylindrical outer walls ofpthe hollow` bodies, as wasdone in compressors of this class heretofore in use. However, such vcleaning should be `frequently done, if unclean cooling water is us'ed.

A feature of my invention consists 1n so 4 arranging the coolingapparatus, that the chambers traversed by the cooling liquid are moreeasily accessible. For this purpose the disk shaped outer wall of thehollow body a (Fig. l), or the outer wall of the hollow body b (Fig. 3),or both of them, are constructed in the form of substantially cup shapeddisks provided with covers or lids "m and n respectively which, withoutincreas- .ing vthe size of the cooling device, are connected with thehollow bodies by means of screw bolts o, or the ,like which can easilybe loosened.. After removing one of the covers or lids m or n the spacestraversed by the cooling medium are `sufficiently accessible to becleaned by means o'f a simple tool. The annular chamber 'of the hollowbody which is not provided can easily be cleaned from the side andthrough apertures;- p provided in the saidf boy. ,The arrangement of thecovers or lids m and 'n is advantageous also in this respect that in themanufacture of the cooling This arrangement is with acover or lidnularchambers subdivided into lsections,

and connecting walls between said bodies' n'oviding intermediate whicheach of the sectional chambers of one of sai-d hollow bodiescommunicates with two adjacent sectional chainbers'of the other .one ofsaid hollow bodes.

2. A cooling apparatus, comprising in combination two annular bodiesarranged adja- 'ceiit to each other and formed with annular chamberssubdivided into sections, connecting walls between said bodies providingintermediate chambers, and partitions dividing said intermediatechambers into -passages, two passages of each intermediate chambercommunicating with the 4same chamber of one body and with successivechambers of the other body.

3. A cooling apparatus, comprising two annular bodies arranged adjacentto each other and formed with annular chambers subdivided into sections,connecting walls between said bodies providing intermediate chambersthrough which each of the sectional chambers of one of said hollowbodies ecm-A inuiiicates with twqadjacent sectional cha mbers of theother one of said hollow bodies,

and ribs provided between said connecting walls and connecting the saidhollow bodies.

4. A cooling apparatus comprising a body formed with `an annularchamber, au annular cup shaped disk arranged adjacent to said body andclosed at its outside bv a cover so as to provide an annular chamber,the chambers provided by said hollow body and cup shaped disk and itscover being divided by partition walls into sections, and connectingwalls arranged between said bodies forming intermediate chambers throughwhich each of the sections of one of said annular chambers vcommunicateswith two adjacent sections of the other one of said 'annular chambers.

In testimony whereof I hereunto affix nii' signature in the presence oftwo witnesses. 'VILLIBALD GRUN.

Witnessesz- HENRY HAsrnR,

WOLDEMAR HAUr'r.

chambers throughy

